Core for radiators



Patented Aug. 14, 1928.

UNITED STATES PATENT OFFICE.

JOHN M. FEDDERS, OF BUFFALO, NEW YORK, ASSIGNOR TO FEDDERS MANUFACTUR- ING COMPANY, INC., OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

CORE FOR RADIA'.I.ORS.Y

Application filed November 7, 1925. Serial No. 67,529.

This invention relatesr to a core for radiators such as are commonly used for cooling the water of gas engines and similar installations. The purpose of this invention is to provide a core for such radiators which can be made more rapidly and easily and in which tight joints can be produced between adjacent sections so as to avoid leakage of water into the air passages.

In the accompanying drawings v Figure 1 is a fragmentary elevation of a radiator core embodying my invention, partly in section the sectional part being taken on line 11 Fig. 3.

Figure 2 is a top plan View thereof.

Figure 3 is a horizontal section of the same taken on line 3er-3 Fig. l. Figures 4 and 5 are vertical longitudinal sections taken on the correspondingly numbered lines in Fig. 2. j

Figure 6 is a fragmentary vertical cross-` section, on an enlarged scale, of several adjacent units of a radiator core made in accoi-dance with my invention the section being `taken on line 6 6 Fig. 2.

Figure 7 is a fragmentary perspective View of a unit forming part of the radiator core.

Similar characters of reference indicate corresponding parts in the several figures' intercalated with the water conduits and eX tending horizontally from the front to the rear side of the radiator core.

These water conduits and air passages are formed by means of a plurality of sheet metal units which are constructed and assembled in accordance with my invention. In the present case these units are superposed so as to form avertical tier, stack or pile and the several units are connected with each other by soldering so that the core as a whole forms onesolid mass which is Strong and durable and not liable to be loosened or distorted under unusually heavy strains which may be imposed on the same.

Each of these units is preferably constructed from a single sheet of metal which is bent to form a plurality of pleats, the longitudinal walls or plies 22 of which are 20 which in the present case are arrangedv vertically, and a plurality of air passages 21 dering so as to form a leak tight joint therebetween. The intermediate parts 240i the walls` of each pleat are spaced apart and at its lower or outer end the same is provided with a longitudinal row of downwardly projecting nipples 25 so that in effect each pleat forms a water tube section. i l

Arranged lengthwise on the outer sides of `the lower parts of the longitudinal walls of each pleat are two laterally projecting ribs or beads each' of which has-a comparatively long central part 25 which is formed on the intermediate part 24 of the pleat wall and two comparatively short parts 26 formed on Y the off-set end parts 23 of the respective pleatvwall. The ribs of each pleat form a fiat downwardly facing shoulderilengthwise on opposite longitudinal sides of the pleat and also transversely across opposite ends of the same which shoulder bears against that part of the upper side of the inner webs 19 around one of the tubular sections of the next lower unit, asshown in Figs. l, 5 and 6.

Theouter web 18 connecting the outer ends of the longitudinal walls of each pleat bulges outwardly or downwardly so as to form longitudinal side shoulders27 on opposite longitudinal sides of each pleat which engage with the inner sides of the longitudinal walls of the adjacent pleat in the next lower unit as shown in Figs. 1 and 8, and also t0 form transversev shoulders 28 at opposite ends of each pleat which engages with the inner side of the end portions of an adjacent pleat in the next lower unit, and shown in Fig. 5. By this means an interlock is produced between adjacent units whereby the same are securely held against longitudinal and transverse displacement relatively to each other and they are positively held in this assembled position preparatory to permanently connecting the several units with each other by soldering. After the required number of units are thus assembled in the vlorln of a core one side ot' the salue is first dipped into a solder bath which causes the oitset ends 23 of the tube sections onzone side of `the core to be united and those parts ol the narrow ribs 2G and wide ribs Q5 to be riveted with the inner ends of adjacent tube sections on the corresponding side of the core. and the core is reversed and the end ribs 2G and intermediate rib portions 25' on the opposite side ot the core and similarly soldered together so that the several units i'orni one connnon or solid mass.

'l'he inwardly ollset end portions 23 of the veral tube sections in cach row rest against each other at their inner and outer edges andare connected by soldering so that they forni lines at opposite ends of the water-tube sections. When a plurality of units are thus asseinbledthe nipples at the outer ends of the water tube sections of one unit project into theinner ends of the water tube sections of an adj acent'unit so that the several water tube sections in `one row communicatewith each other and produce a continuous water tube which constitutes one of the water con* duits. oi' the radiator.

When a plurality of units are thus assembled the saine also forni a plurality of air passages 21, each of these passages being formed between the opposing walls of two water tube sections on one unit and between the inner web connecting these walls and the corresponding web of the adjacent unit.

When` associated with other parts which make. upa complete radiator the heated water to be cooled is introduced into one end ot the water tubes and discharged from the oppositeends thereof for which purpose the ends oit-these water tubes open into water supply and delivery manifolds, boxes or headerswhich-are not shown in the drawings and. whichinay beconnected with the op'- posite .ends ofthewater tubes in any suitfc ableand well. knownlnanner.

Istreamer air passing through the respective air conduit. These loops are bent alternateljy upwardly and downwardly to form baffles or wings in each air passage and thus obstruct the passage of the air and compel the saineLto take a tortuous course and ab.-

sorb an increased alnount ol heat from the water troni the tin'ie the air enters the iront side ot the radiator until it leaves at the rear side of the same.

In the 'foregoing radiator core the laterally projecting ribs ou the tube sections lorul flat shoulders on the underside thcrcol which engage with the llat surfaces on the inner webs around the inner ends ot thi` tube sections. which co-operating surfaces are ol eru'cnded area and thcrc'lorc perxnit'oif reliably solderinpr together adjacent units at the surfaces and thus torni a leak light joint therebetween without any n1ain1l'acl.uringr (.liliculties.

I claim as my invention:

1. A radiator core having a plurality of water tubes and a plurality of air passages intercalated with said water tubes, said core comprising a plurality of units arranged adjacent to each other and'each unit beinlcr constructed ot a sheet of metal which is bent to forni a plurality of pleats and a plurality of webs, the walls of xach pleat beingr spaced apart but connected with each other at one pair ot corresponding` longitudinal outer edges while their transverse edges at the ends ther-cot abut against one another to form a tube section, and each of' said webs connecting the opposite longitudinal inner edge ot' one wall of a tube section with the corresponding longitudinal inner edge of the wall of' an adjacent tube section, the outer ends of the tube section of one unit being provided with laterally projecting ribs which engage the webs around the inner ends of the tube sections of an adjacent unit and also provided with outwardly bulging parts fitting into the ends of adjacent tube sections, the tube sections of the several units communicating to form said water tubes and the webs of adjacent units being spaced apart to form said air passages.

Q. A radiator core having a plurality of water tubes and a plurality of air passages intercalated with said water tubes, said core comprising a plurality of units arranged adjacent to each other and each unit being constructed of a sheet of metal which is bent to form a plurality of pleats and a plural ity of webs, the walls of each pleat being spaced apart but connected with cach other at one pair of corresponding longitudinal outer edges while their transverse edges at the ends thereof abut against one another to forni a tube section. and each of said webs connecting the opposite longitudnal inner edge ot one wall of a tube section with the corresponding longitudinal inner edge of the wall ot an adjacent tube section, the outer ends oi the tube sections of one unit engaging the inner ends of the tube sections of an adjacent unit and connuunicatinry therewith to form said water tubes7 and the webs of adjacent units being spaced apart to Jorm said air passages therebetween, some of said webs being provided with slits and the metal between said slits being deflected laterally therefrom to form loops.

3. A radiator core having a plurality of water tubes and a plurality of air passages intercalated with said water tubes, said core comprising a plurality ofA units arranged adjacent to each other and each unit being constructed of a sheet of metal which is bent to `form a plurality of pleats and a plurality of webs, the Walls of each pleat being spaced apart but connected with each other :it one pair of corresponding longitudinal outer edges while their transverse edges at the ends thereof abut against one another to form a. tube section, and each of said webs connecting the opposite longitudinal inner edge of one wall of a tube section with the corresponding longitudinal inner edge of the wall of an adjacent tube section, the outer ends of the tube sections of one unit engaging the inner ends of the tube sections of an adjacent unit and communicating therewith to form said Water tubes, and the webs of adjacent units being spaced apart to form said air passages therebetween some of said webs being provided with pairs of slits and the metal between each pair 0f slits being deflected laterally therefrom in opposite directions to form loop-shaped baffles.

JOHN M. FEDDERS. 

